From patchwork Wed Dec 12 09:50:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandan Rajendra X-Patchwork-Id: 1011752 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-ext4-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43FBtX4JLcz9s47 for ; Wed, 12 Dec 2018 20:52:20 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726913AbeLLJwU (ORCPT ); Wed, 12 Dec 2018 04:52:20 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:53978 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726962AbeLLJwT (ORCPT ); Wed, 12 Dec 2018 04:52:19 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wBC9nNMw082877 for ; Wed, 12 Dec 2018 04:52:18 -0500 Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by mx0b-001b2d01.pphosted.com with ESMTP id 2pawdw6nkb-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 12 Dec 2018 04:52:17 -0500 Received: from localhost by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 12 Dec 2018 09:52:09 -0000 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wBC9q7Q429622458 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 12 Dec 2018 09:52:07 GMT Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0E94F6A04F; Wed, 12 Dec 2018 09:52:07 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6CBB66A047; Wed, 12 Dec 2018 09:51:57 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.85.69.92]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 12 Dec 2018 09:51:57 +0000 (GMT) From: Chandan Rajendra To: linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-doc@vger.kernel.org, linux-mips@linux-mips.org, linux-s390@vger.kernel.org, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org Cc: Chandan Rajendra , tytso@mit.edu, adilger.kernel@dilger.ca, ebiggers@kernel.org, jaegeuk@kernel.org, yuchao0@huawei.com, corbet@lwn.net, ralf@linux-mips.org, paul.burton@mips.com, jhogan@kernel.org, green.hu@gmail.com, deanbo422@gmail.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, richard@nod.at, dedekind1@gmail.com, adrian.hunter@intel.com, viro@zeniv.linux.org.uk, Eric Biggers Subject: [PATCH V5 9/9] fsverity: Move verity status check to fsverity_prepare_setattr Date: Wed, 12 Dec 2018 15:20:18 +0530 X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181212095018.12648-1-chandan@linux.vnet.ibm.com> References: <20181212095018.12648-1-chandan@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 18121209-0020-0000-0000-00000E988D36 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010214; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000270; SDB=6.01130624; UDB=6.00587518; IPR=6.00910758; MB=3.00024664; MTD=3.00000008; XFM=3.00000015; UTC=2018-12-12 09:52:15 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18121209-0021-0000-0000-000064060AD7 Message-Id: <20181212095018.12648-10-chandan@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-12-12_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1812120087 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Instead of conditionally checking for verity status of an inode before invoking fsverity_prepare_setattr(), this commit moves the check inside the definition of fsverity_prepare_setattr(). Signed-off-by: Chandan Rajendra (EB: fix the !CONFIG_FS_VERITY case and inline the IS_VERITY() check) Signed-off-by: Eric Biggers --- fs/ext4/inode.c | 8 +++----- fs/f2fs/file.c | 8 +++----- fs/verity/setup.c | 14 ++------------ include/linux/fsverity.h | 25 ++++++++++++++++++++++--- 4 files changed, 30 insertions(+), 25 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 703f55635824..44561e68886b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5510,11 +5510,9 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) if (error) return error; - if (IS_VERITY(inode)) { - error = fsverity_prepare_setattr(dentry, attr); - if (error) - return error; - } + error = fsverity_prepare_setattr(dentry, attr); + if (error) + return error; if (is_quota_modification(inode, attr)) { error = dquot_initialize(inode); diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 925c0d9608da..422907ca37c6 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -798,11 +798,9 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr) if (err) return err; - if (IS_VERITY(inode)) { - err = fsverity_prepare_setattr(dentry, attr); - if (err) - return err; - } + err = fsverity_prepare_setattr(dentry, attr); + if (err) + return err; if (is_quota_modification(inode, attr)) { err = dquot_initialize(inode); diff --git a/fs/verity/setup.c b/fs/verity/setup.c index 4ecaeb89166b..2b707589999c 100644 --- a/fs/verity/setup.c +++ b/fs/verity/setup.c @@ -767,17 +767,7 @@ int __fsverity_file_open(struct inode *inode, struct file *filp) } EXPORT_SYMBOL_GPL(__fsverity_file_open); -/** - * fsverity_prepare_setattr - prepare to change a verity inode's attributes - * @dentry: dentry through which the inode is being changed - * @attr: attributes to change - * - * Verity files are immutable, so deny truncates. This isn't covered by the - * open-time check because sys_truncate() takes a path, not a file descriptor. - * - * Return: 0 on success, -errno on failure - */ -int fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr) +int __fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr) { if (attr->ia_valid & ATTR_SIZE) { pr_debug("Denying truncate of verity file (ino %lu)\n", @@ -786,7 +776,7 @@ int fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr) } return 0; } -EXPORT_SYMBOL_GPL(fsverity_prepare_setattr); +EXPORT_SYMBOL_GPL(__fsverity_prepare_setattr); /** * fsverity_prepare_getattr - prepare to get a verity inode's attributes diff --git a/include/linux/fsverity.h b/include/linux/fsverity.h index 0ce170c2c167..099fc34936fa 100644 --- a/include/linux/fsverity.h +++ b/include/linux/fsverity.h @@ -26,7 +26,8 @@ extern int fsverity_ioctl_measure(struct file *filp, void __user *arg); /* setup.c */ extern int __fsverity_file_open(struct inode *inode, struct file *filp); -extern int fsverity_prepare_setattr(struct dentry *dentry, struct iattr *attr); +extern int __fsverity_prepare_setattr(struct dentry *dentry, + struct iattr *attr); extern int fsverity_prepare_getattr(struct inode *inode); extern void fsverity_cleanup_inode(struct inode *inode); extern loff_t fsverity_full_i_size(const struct inode *inode); @@ -63,8 +64,8 @@ static inline int __fsverity_file_open(struct inode *inode, struct file *filp) return -EOPNOTSUPP; } -static inline int fsverity_prepare_setattr(struct dentry *dentry, - struct iattr *attr) +static inline int __fsverity_prepare_setattr(struct dentry *dentry, + struct iattr *attr) { return -EOPNOTSUPP; } @@ -129,4 +130,22 @@ static inline int fsverity_file_open(struct inode *inode, struct file *filp) return 0; } +/** + * fsverity_prepare_setattr - prepare to change a verity inode's attributes + * @dentry: dentry through which the inode is being changed + * @attr: attributes to change + * + * Verity files are immutable, so deny truncates. This isn't covered by the + * open-time check because sys_truncate() takes a path, not a file descriptor. + * + * Return: 0 on success, -errno on failure + */ +static inline int fsverity_prepare_setattr(struct dentry *dentry, + struct iattr *attr) +{ + if (IS_VERITY(d_inode(dentry))) + return __fsverity_prepare_setattr(dentry, attr); + return 0; +} + #endif /* _LINUX_FSVERITY_H */